Class 11 Nootan Physics Solution. We covered all the Class 11 Nootan Physics Solution in this post for free so that you can practice well for the exam.
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Class 11 Nootan Physics Solution for Students
The number of tubes of force originating from a charge depends upon
(A) the magnitude of the charge
(B) the nature of the dielectric medium
(C) the closed surface area
(D) the magnitude of charge and nature of the dielectric medium
Option b – the nature of the dielectric medium
A capacitor with air as the dielectric is charged to a potential of 100 V. If the space between the plates is now filled with a dielectric constant 10. The potential difference between the plates will be :
(A) 100 V
(B) 1000 V
(C) 10 V
(D) 50 V
Option c – 10 V
A capacitor of capacity 100 μμF is charged to 100 V. On disconnecting with the battery, it is connected in parallel with another condenser. If the final potential is 30 V, the capacity of the second condenser will be :
(A) 233 μμF
(Β) 2,33 μμF
(C) 150 μμF
(D) 522 μμF
Option a – 233 μμF
An uncharged capacitor is connected to a battery. On charging the capacitor :
(A) all the energy supplied is stored in the capacitor
(B) half energy supplied is stored in the capacitor
(C) the energy stored depends upon the capacity of the capacitor only
(D) the energy stored depends upon the time for which the condenser is charged
Option d – the energy stored depends upon the time for which the condenser is charged
Two capacitors C₁ and C₂ are charged to 120 V and 200 V respectively. It is found that by connecting them together the potential of each one can be made zero. Then :
(A) 5C₁=3C2
(B) 3C₁=5C₂
(C) 3C₁+5C₂=0
(D) 9C₁=4C₂
Option b – 3C₁=5C₂
A point charge of 5 mC is situated in the air at the center of a sphere of radius 15 cm. The T.N.E.I. through a portion of the surface of the sphere which subtends an angle of л/2 steradians at the center will be :
(A) 0.375 mC
(B) 0.625 mC
(C) 5 mC
(D) 1.625 mC
Option d – 1.625 mC
A 20 μF capacitor is charged to 200 V and its plates are connected by a wire. The heat produced in the wire is :
(A) 0.8 J
(B) 1.6 J
(C) 3.2 J
(D) 0.4 J
Option d – 0.4 J
The ratio of work done in blowing soap bubbles having radii in the ratio 3 : 4 is :
(A) 3 : 4
(B) 4 : 3
(C) 9:16
(D) 16 : 9
Option c – 9:16
A water drop is divided into eight equal droplets, the radius of the droplet :
(A) Is equal to the radius of the drop
(B) Is double the radius of the drop
(C) Half the radius of the drop
(D) One – eight of the radius of the drop
Option c – Half the radius of the drop
The potential energy of a molecule on the surface of a liquid compared to that of a molecule inside the liquid is :
(A) Smaller
(B) The same
(C) Greater
(D) Zero
Option c – Greater
The surface tension of a liquid is T. The increase in its surface energy on increasing the surface area by A is :
(A) A/T
(B) AT
(C) A²T
(D) A²T²
Option b – AT
A drop of water breaks into two droplets of equal size. In this process, which of the following statements is correct?
(A) The sum of the temperature of the two droplets together is equal to the original drop
(B) The sum of the masses of the two droplets is equal to the original mass of the drop
(C) The sum of the radii of the two droplets is equal to the radius of the drop
(D) The sum of the surface areas of the two droplets is equal to the surface area of the original drop
Option b – The sum of the masses of the two droplets is equal to the original mass of the drop
Molecules on the surface of the liquid have :
(A) Maximum kinetic energy
(B) Maximum potential energy
(C) Minimum kinetic energy
(D) Minimum potential energy
Option b – Maximum potential energy
The surface tension of a liquid is numerically equal to
(A) Surface energy
(B) Surface energy per unit length
(C) Surface energy per unit area
(D) Surface energy per unit volume
Option a – Surface energy
On mixing salt in water, the surface tension of water will :
(A) Increase
(B) Decrease
(C) Remain unchanged
(D) Nothing can be said specifically
Option a – Increase
What will be the effect on surface tension, if we add sugar to water?
(A) It will decrease
(B) It will become zero
(C) It will increase
(D) It will not change
Option c – It will increase
When soap is added to water, the surface tension of the soap solution is :
(A) Less than that of water
(B) Same as that of water
(C) More than that of water
(D) Sometimes more and sometimes less than that of water
Option a – Less than that of water
Soap helps in better cleaning of clothes because :
(A) It reduces the surface tension of the solution
(B) It increases the surface tension of the solution
(C) It absorbs the dirt
(D) It gives strength to the solution
Option a – It reduces the surface tension of the solution
A drop is broken into many droplets, the sum of which property of droplets is equal to that of the single drop :
(A) Surface energy
(B) Radius
(C) Volume
(D) Surface area.
Option c – Volume
Two drops of a liquid merge to form a single drop. In this process:
(A) Energy is released
(B) Energy is absorbed
(C) Energy may be released or absorbed depending on the specific heat of the liquid
(D) Energy is neither released nor absorbed
Option a – Energy is released
Find the number of days in a year on earth if it describes an orbit around the Sun, thrice its present radius.
(A) 1897 days
(B) 936 days
(C) 2424 days
(D) 1286 days
Option a – 1897 days
A satellite is moving around the earth at a distance x from the center of the earth. If the radius of the circular orbit is reduced by 5%, then the speed will increase by
(A) 3%
(B) 2.5%
(C) 1.5%
(D) 5%
Option b – 2.5%
A car moving with a speed of 72 km/h stops covering a distance of at least 5 m after applying brakes. If the same car is moving at a speed of 92 km/h, what is the minimum distance covered by it before coming to halt after the application of brakes?
(A) 2.61 m
(B) 8.16 m
(C) 7.64 m
(D) 5.28 m
Option b – 8.16 m
Two cars hit an object with a velocity of 40 m/s each and the angle between them is 60°, then the direction of the sum of the two vectors is
(A) 180°
(B) 30°
(C) 60°
(D) 90°
Option b – 30°
Calculate the speed with which a satellite is projected into an orbit if it revolves around the earth in a circular orbit at a distance of 5000 km from the surface of the earth. (g = 10 m/s²)
(A) 6 km/s
(B) 12 km/s
(C) 15 km/s
(D) 8 km/s
Option a – 6 km/s
The gravitational force on a body of mass 10 kg at the surface of the earth is 100 N. If the earth is a perfect sphere, the gravitational force on an object of mass 100 kg in a circular orbit of radius same as the diameter of the earth is
(A) 500 N
(B) 250 N
(C) 150 N
(D) 300 N
Option b – 250 N
Calculate the velocity of river water if a boat is moving with a speed of 10 km/hr in still water and it crosses the river of width 0.5 km along the shortest possible path in 10 minutes.
(A) 7 km/hr
(B) 9 km/hr
(C) 12 km/hr
(D) 10 km/hr
Option a – 7 km/hr
The bullet emerges from a barrel of length 1 m with a speed of 500 m/s. Assuming constant acceleration the approximate time it spends in the barrel after the gas is fired is
(A) I ms
(B) 4 ms
(C) 2 ms
(D) 6 ms
Option b – 4 ms
Find the acceleration due to gravity on the surface of the planet if the radius of the planet is 1/2 that of the earth and its mass is 1/60 times that of the earth.
(A) g/7
(B) g/30
(C) g/15
(D) g/20
Option c – g/15
The initial velocity of a body moving along a straight line is 8 m/s. If it covers a distance of 25 m in 8 s, then calculate the acceleration of the body.
(A) 1.69 m/s²
(B) 6.48 m/s²
(C) 4.28 m/s²
(D) 2.26 m/s²
Option d – 2.26 m/s²
In the scalar product of P and Q if the angle between them is 180°, then two vectors are
(A) parallel to each other.
(B) antiparallel to each other.
(C) perpendicular to each other.
(D) none of the above.
Option b – antiparallel to each other.
A vector of the same magnitude but directed opposite to that of the given vector, then it is a ………
(A) zero vector
(B) resultant vector
(C) negative vector
(D) position vector
Option c – negative vector
The velocity of two satellites A and B are 4v and respectively. If the radius of the circular orbit of 5v satellite A is 4R, then find the radius of satellite B.
(A) 7.31 R
(B) 2.56 R
(C) 1.56 R
(D) 4.28 R
Option b – 2.56 R
Find the net displacement of an airplane if it flies 500 m north and 200 m south and then flies 1000 m upward.
(A) 1506 m
(B) 1608 m
(C) 908 m
(D) 1044 m
Option d – 1044 m
The orbital velocity of INSAT 1-B is nearly
(A) 11.2 km/s
(B) 3.07 km/s
(C) 2.6 km/s
(D) 1.8 km/s
Option b – 3.07 km/s
What will be the maximum resultant tension when two tensile force of 2 N and 6 N a body acts on a body?
(A) 5 N
(B) 2N
(C) 4N
(D) 8N
Option d – 8N
If the horizontal velocity is greater than or equal to the escape velocity, then the satellite will
(A) be lost in space.
(B) reach a certain height and fall down following a straight line path.
(C) reach a certain height and fall down following a parabolic path.
(D) will move in a circular path near the earth.
Option a – be lost in space.
The speed of two identical cars is 2u and 4u respectively. Find the ratio of the respective distances at which the two cars are stopped from that instant.
(A) 1 : 8
(B) 1:16
(C) 1 : 4
(D) 1 : 2
Option c – 1 : 4
The value of the acceleration due to gravity g at a point 9 km above the earth’s surface and 9 km below the earth’s surface are respectively
(A) 9.772 m/s², 9.786 m/s²
(B) 9.72 m/s², 0 m/s²
(C) 9.786 m/s², 9.772 m/s²
(D) 0 m/s², 9.786 m/s²
Option a – 9.772 m/s², 9.786 m/s²
The main scale of an instrument marked up to 12 cm is equally divided into 200 parts. Its secondary scale of 20 divisions coincides with 6 mm on the main scale. The least count of the instrument is
(A) 0.1 cm
(B) 0.03 cm
(C) 0.06 cm
(D) 0.01 cm
Option b – 0.03 cm
Find the height above the surface of the earth where g is one-third of its value at its surface is
(A) 0.73 R
(B) 0.5 R
(C) 1.43 R
(D) 0.1 R
Option a – 0.73 R
Find the ratio of the period of two satellites S₁ and S₂ which are revolving at a distance of 4R and 6R from their center.
(A) 0.54 : 1
(B) 0.84 : 1
(C) 0.14 : 1
(D) 0.34 : 1
Option a – 0.54 : 1
Calculate the displacement of the particle at the end of 2 seconds, if it starts from rest with a velocity of v = 4t² +9t + 1.
(A) 30.66 m
(B) 20.64 m
(C) 40.88 m
(D) 10.43 m
Option a – 30.66 m
The ratio of the radius of the earth to that of a planet is 5 : 1. The ratio of accelerations due to gravity on earth and on planet is 4 : 1. The ratio of the escape velocity from the surface of earth to that from the planet is nearly
(A) 5.5 : 1
(B) 3.5 : 1
(C) 2.5 : 1
(D) 4.5 : 1
Option d – 4.5 : 1
Calculate the velocity of the particle at t = 4 s if it starts from rest and moves with an acceleration of a = 4 (t-1).
(A) 5 m/s
(B) 16 m/s
(C) 10 m/s
(D) 12 m/s
Option b – 16 m/s
Assertion: AxB=BXA Reason: The cross product of two vectors is commutative. ( NEET Physics MCQ Questions and Answers )
(A) The assertion is True, Reason is True; Reason is a correct explanation for Assertion.
(B) The assertion is True, and Reason is True; Reason is not a correct explanation for Assertion.
(C) The assertion is True, Reason is False.
(D) The assertion is False, Reason is False.
Option d – The assertion is False, Reason is False.
The percentage error in the measurement of mass, acceleration due to gravity, and height are 1%, 2%, and 4% respectively. What will be the maximum error in the estimation of PE?
(A) 2%
(B) 8%
(C) 4%
(D) 7%
Option d – 7%
A drop of liquid of diameter 2.8 mm breaks up into 125 identical droplets. The change in energy is nearly (Surface tension of liquid=75 dyne/cm) :
(A) Zero
(B) 19 erg
(C) 46 erg
(D) 73.85 erg
Option d – 73.85 erg
The work done in blowing a bubble of radius R is W. The work done in making the bubble of radius 2R from the same soap solution is :
(A) W/2
(B) 2 W
(C) 4 W
(D) W/4
Option c – 4 W
One thousand small water droplets of equal size combine to form a big drop. The ratio of the final surface energy to the initial surface energy is (Surface tension of water = 70 dyne/cm) :
(A) 10 : 1
(B) 1:10
(C) 1000 : 1
(D) 1 : 1000
Option b – 1 : 10
A soap bubble has a radius of 2 cm. The work done in doubling its radius is (T= 30 dyne/cm) :
(A) Zero
(B) 2261 erg
(C) 1135.5 erg
(D) 9043 erg
Option d – 9043 erg
We covered all the class 11 nootan physics solution above in this post for free so that you can practice well for the exam.
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- UP Board Solution Class 11 Physics
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